Clothar married Beretrude in 605 in Soissons, Aisne, Picardie, France. (Beretrude was born in 582 in Bourgogne, France and died in 618 in Paris, Ile-de-France, France.)

Clothar next married Hadeltrude in 599 in Soissons, Aisne, Picardie, France. (Hadeltrude was born in 586 in Soissons, Aisne, Picardie, France and died in 604 in Rouen, Seine-Maritime, Haute-Normandie, France.)